Invista North America S.a.r.l.

Invista Technologies S.a.r.l.

Elizabeth Todd Singewald

Graham H Laycock

Raymond S P Leung

Nathan E Houser

Gordon W Selling

Fred C Wynegar

Cheng-Yuan Chuang

Beverly Jean Selle

Robert Dewhurst

Peter George Szanto

Steven Peter Pardini

Raymond Sp Leung

Raymond S Leung

Graham Laycock

Raymond SP Leung

Fred Wynegar

Commercial spandex can be prepared with greater efficiency, improved consistency and at lower costs from a high-solids content polyurethaneurea polymer solution. The polyurethaneurea is prepared using a combination of 4,4'-MDI and 2,4&#x2032;-MDI, and an amount of chain extenders and chain terminators such that the polymer solution, prior to spinning, is highly soluble and has an appropriate pre-spun IV and primary amine content. Such spandex fibers, and the fabrics and garments comprising them, have good dyeability and colorfastness, as well as other desirable characteristics.

Dyeable spandex

Circular knit, elastic fabrics of at least one of single jersey, French terry, and fleece are disclosed that include a bare elastomeric material plated with spun and/or continuous filament hard yarns. The circular knit, elastic fabrics of at least one of single jersey, French terry, and fleece are manufactured by a method that does not require a dry heat setting step. The method requires drafting the bare elastomeric material no more than about 2.5&#xd7; its original length when knitting to form the circular knit, elastic fabrics of at least one of single jersey, French terry, and fleece.

Knit by design method and fabric

Circular-knit, elastic, single-knit jersey fabric, of spun and/or continuous filament hard yarns with bare spandex plated in every course, has a cover factor in the range of 1.3 to 1.9, a basis weight from 140 to 240 g/m, an elongation of 60% or more and low shrinkage. The circular knit, single-knit jersey fabric is produced by maintaining the draft of the spandex at or below 2&#xd7; (100% elongation) and maintaining the finishing and drying temperature(s) below the spandex heat set temperature. The knit fabric meets the end-use specifications without heat setting.

Method to make circular-knit elastic fabric comprising spandex and hard yarns

Circular-knit, elastic, single-knit jersey fabric, of spun and/or continuous filament hard yarns with bare spandex plated in every course, has a cover factor in the range of 1.3 to 1.9, a basis weight from 140 to 240 g/m , an elongation of 60% or more and low shrinkage. The circular knit, single-knit jersey fabric is produced by maintaining the draft of the spandex at or below 2&times; (100% elongation) and maintaining the finishing and drying temperature(s) below the spandex heat set temperature. The knit fabric meets the end-use specifications without heat setting.

Growing community of inventors

Wilmington, DE, United States of America

Elizabeth Todd Singewald